Saltwater intrusion management of coastal aquifers I: linked simulation-optimization

Dhar, Anirban, and Datta, Bithin (2009) Saltwater intrusion management of coastal aquifers I: linked simulation-optimization. Journal of Hydrologic Engineering, 14 (12). pp. 1263-1272.

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A set of different methodologies are developed for multiple objective management of coastal aquifers. The coastal aquifer management models are developed using a numerical simulation model, meta-model, and the multiple objective optimization algorithm NSGA-II. The NSGA-II algorithm is also modified to accommodate initial solution generation using the Latin hypercube sampling for uniform sampling in bound space. These initial solutions are useful to improve the efficiency of the optimization algorithm. One important issue in developing management models for coastal aquifers incorporating the density dependent flow and transport processes is the computational feasibility. A few variations of the management model are also evaluated to test the potential for improving the computational efficiency. The variations in the formulation of management models include: direct linking of numerical simulation model, introducing meta-models in this study artificial neural network ANN in place of original numerical simulation model, using partially trained meta-model as a screening model for specifying initial solutions for the numerical simulation model linked optimization model. The developed models are capable of obtaining the nondominated front of the multiobjective management model without solving the modified single objective model iteratively. Also, the meta-model approach is shown to be computationally efficient in generating the nondominated front, especially when a partially trained ANN-based meta-model is used as an initial screening model for the nondominated front search process. These developed methodologies are tested for an illustrative coastal aquifer study area. The performance evaluations show potential applicability of developed methodologies for multiobjective management of saltwater intrusion in coastal aquifers.

Item ID: 9348
Item Type: Article (Research - C1)
ISSN: 1943-5584
Keywords: salt water intrusion; simulation models; optimization; aquifers; coastal environment
Date Deposited: 14 Apr 2010 00:55
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090509 Water Resources Engineering @ 50%
09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 50%
SEO Codes: 96 ENVIRONMENT > 9606 Environmental and Natural Resource Evaluation > 960604 Environmental Management Systems @ 50%
96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960506 Ecosystem Assessment and Management of Fresh, Ground and Surface Water Environments @ 25%
96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 25%
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